231700216 has 32 divisors (see below), whose sum is σ = 486748080. Its totient is φ = 102470400.

The previous prime is 231700199. The next prime is 231700241. The reversal of 231700216 is 612007132.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32325 + ... + 38836.

Almost surely, 2^231700216 is an apocalyptic number.

It is an amenable number.

231700216 is an abundant number, since it is smaller than the sum of its proper divisors (255047864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231700216 is a wasteful number, since it uses less digits than its factorization.

231700216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71215 (or 71211 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 231700216 is about 15221.7021387229. The cubic root of 231700216 is about 614.1985868548.

Adding to 231700216 its reverse (612007132), we get a palindrome (843707348).

The spelling of 231700216 in words is "two hundred thirty-one million, seven hundred thousand, two hundred sixteen".